Home / 38,913.05-53,702.63-21,688.10

Finding the Fourth Proportional to 38,913.05, 53,702.63 and 21,688.10

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Solution

The fourth proportional to 38,913.05, 53,702.63 and 21,688.10 is: 29,931.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,913.05 : 53,702.63 = 21,688.10 : x
  2. Step 2: Convert to fraction form
    38,913.05/53,702.63 = 21,688.10/x
  3. Step 3: Cross multiply
    38,913.05x = 53,702.63 × 21,688.10
  4. Step 4: Simplify right side
    38,913.05x = 1,164,707,901.26
  5. Step 5: Solve for x
    x = 1,164,707,901.26/38,913.05
  6. Step 6: Final answer
    x = 29,931.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.